Security Guidance
alirezarezvani/claude-skills
PreToolUse security-anti-pattern hook for Claude Code. An agent skill from alirezarezvani/claude-skills.
Review and harden security for htmx and server-driven web apps.
Install Htmx Security
$ npx skills add hashgraph-online/awesome-codex-plugins --skill htmx-security -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins htmx-security --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/LVTD-LLC/skills/skills/htmx-security .claude/skills/htmx-security && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "htmx-security" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/LVTD-LLC/skills/skills/htmx-security into .claude/skills/htmx-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "htmx-security", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/LVTD-LLC/skills/skills/htmx-securityType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add hashgraph-online/awesome-codex-plugins --skill htmx-security -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins htmx-security --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/LVTD-LLC/skills/skills/htmx-security .agents/skills/htmx-security && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "htmx-security" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/LVTD-LLC/skills/skills/htmx-security into .agents/skills/htmx-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "htmx-security", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add hashgraph-online/awesome-codex-plugins --skill htmx-security -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins htmx-security --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/LVTD-LLC/skills/skills/htmx-security .cursor/skills/htmx-security && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "htmx-security" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/LVTD-LLC/skills/skills/htmx-security into .cursor/skills/htmx-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "htmx-security", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/hashgraph-online/awesome-codex-plugins.git --path plugins/LVTD-LLC/skills/skills/htmx-security--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add hashgraph-online/awesome-codex-plugins --skill htmx-security -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins htmx-security --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/LVTD-LLC/skills/skills/htmx-security .gemini/skills/htmx-security && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "htmx-security" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/LVTD-LLC/skills/skills/htmx-security into .gemini/skills/htmx-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "htmx-security", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install hashgraph-online/awesome-codex-plugins htmx-securityInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add hashgraph-online/awesome-codex-plugins --skill htmx-security -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/LVTD-LLC/skills/skills/htmx-security .github/skills/htmx-security && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "htmx-security" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/LVTD-LLC/skills/skills/htmx-security into .github/skills/htmx-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "htmx-security", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add hashgraph-online/awesome-codex-plugins --skill htmx-security -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins htmx-security --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/LVTD-LLC/skills/skills/htmx-security .opencode/skills/htmx-security && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "htmx-security" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/LVTD-LLC/skills/skills/htmx-security into .opencode/skills/htmx-security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "htmx-security", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
htmx-security- GitHub stars
- 1.2k
- Token cost
- ~1.3k tokens
- SKILL.md length
- 649 words
- Files
- 3 (incl. assets)
- Skills in repo
- 736
- Repo updated
- First seen
- Licence
- MIT
At a glance
Review and harden security for htmx and server-driven web apps.
- Handling user-supplied HTML
- SKILL.md covers Threat Model, Baseline Rules, User Content and htmx-Specific Risks, plus 6 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Sanitizing fragments
What it does
Htmx Security is an agent skill from hashgraph-online/awesome-codex-plugins. Review and harden security for htmx and server-driven web apps. Use when handling user-supplied HTML, escaping or sanitizing fragments, adding CSP, evaluating XSS risk, configuring CSRF or cookies, loading htmx from a CDN, using SRI hashes, accepting hx- attributes from content, or reviewing htmx request headers and history caching.
Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including assets (for example `agents/openai.yaml`). Compatibility notes: Codex, Claude Code, and other Agent Skills-compatible clients.
It sits in Security, covering Web application vulnerabilities and Caching. The repository describes itself as: A curated list of awesome OpenAI Codex / ChatGPT plugins, skills, and resources. The 1 Codex Marketplace. See live plugins at: https://hol.org/plugins/best-codex-plugins. The licence is MIT.
When your agent uses it
- Handling user-supplied HTML
- Sanitizing fragments
- Evaluating XSS risk
- Configuring CSRF
Example prompts
- “/htmx-security”
Requirements
- Compatibility (from SKILL.md): Codex, Claude Code, and other Agent Skills-compatible clients.
What it can do on your machine
Read from SKILL.md and the folder at commit 16b4156. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Compatibility
Codex, Claude Code, and other Agent Skills-compatible clients.
From compatibility in the SKILL.md frontmatter.
Context cost
Htmx Security loads about 1.3k tokens when it runs. Until then it costs about 87 tokens; SKILL.md has 649 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from hashgraph-online/awesome-codex-plugins at commit 16b4156, republished under its MIT licence (© hashgraph-online). 649 words, ~1,306 tokens.
Download SKILL.mdSave it as
.claude/skills/htmx-security/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.- name
- htmx-security
- description
- Review and harden security for htmx and server-driven web apps. Use when handling user-supplied HTML, escaping or sanitizing fragments, adding CSP, evaluating XSS risk, configuring CSRF or cookies, loading htmx from a CDN, using SRI hashes, accepting hx-* attributes from content, or reviewing htmx request headers and history caching.
- compatibility
- Codex, Claude Code, and other Agent Skills-compatible clients.
- license
- MIT
- metadata.version
- 0.1.0
- metadata.displayName
- htmx Security
- metadata.category
- Frontend
- metadata.tags
- htmx,security,xss,csp,frontend
htmx Security
Use this skill before shipping htmx features that render user content, accept rich HTML, add third-party scripts, change Content Security Policy, or expose new mutation endpoints.
Threat Model
htmx keeps rendering on the server, but unsafe HTML is still unsafe HTML. A fragment swap can insert scripts, event handlers, dangerous URLs, or htmx attributes that cause requests. Treat every fragment as executable browser surface unless it is escaped or sanitized.
Baseline Rules
- Escape user-supplied text by default.
- Sanitize rich HTML on the server with a strict allowlist.
- Strip or block
hx-*,data-hx-*,hx-on, inline event handlers,script, dangerous URLs, and style features that the product does not explicitly allow. - Keep auth, authorization, and validation on the server.
- Use CSRF protection for same-origin mutations.
- Do not put secrets, privileged object IDs, or authorization decisions in HTML attributes.
- Keep htmx requests same-origin unless CORS, CSRF, cookies, and credentials are deliberately designed.
User Content
Choose one content policy:
| User content type | Policy |
|---|---|
| Plain text | Escape and render as text |
| Markdown | Render through a sanitizer and allow only safe tags/attributes |
| Rich HTML | Sanitize with a narrow allowlist and strip htmx/event/script capabilities |
| Trusted admin HTML | Still sanitize unless the trust boundary is documented and access is tightly controlled |
Do not mark content safe merely because it was stored in the database earlier.
htmx-Specific Risks
- User-controlled
hx-get,hx-post,hx-put,hx-patch,hx-delete, orhx-triggercan create unintended requests. - User-controlled
hx-onor inline handlers can execute JavaScript. - User-controlled
hx-valscan smuggle unexpected parameters. - Fragment responses can replace more of the page than intended if targets are broad.
- History caching can retain sensitive HTML on the client.
Use hx-history="false" on sensitive pages or containers that should not be stored in htmx history cache.
CSRF And Cookies
- Prefer the framework's standard CSRF mechanism.
- Configure htmx to send the CSRF header once in the base layout or startup script.
- Keep CSRF tokens out of logs and analytics.
- Use
Secure,HttpOnly, andSameSitecookie settings appropriate to the app. - Avoid cross-site htmx mutations unless the app has a clear credential policy.
CDN And Script Loading
Prefer vendored static assets for reproducibility. If loading htmx or extensions from a CDN:
- pin the exact version;
- include Subresource Integrity where possible;
- set
crossoriginwhen required by SRI; - document why CDN loading is acceptable for the app;
- monitor version changes deliberately rather than floating to latest.
Show full SKILL.md (257 more words)Show less
Content Security Policy
Design CSP around the actual frontend stack:
- htmx can work with a strict CSP when inline scripts and unsafe eval are avoided.
- Inline event handlers,
hx-on, Alpine default builds, and_hyperscriptcan require looser policies unless replaced with CSP-compatible patterns. - Start with report-only mode for existing apps, then tighten.
- Include reporting endpoints only when someone reviews reports.
- Test swapped fragments under the final CSP, not just the initial page load.
Review Checklist
- Are all mutation endpoints protected by auth, authorization, and CSRF?
- Does every endpoint re-check permissions server-side?
- Are user values escaped in fragments and full pages?
- Is any rich content sanitized with an allowlist?
- Can user content inject
hx-*,hx-on, event handlers, scripts, or dangerous URLs? - Are sensitive fragments excluded from htmx history cache?
- Are third-party scripts pinned and integrity-checked?
- Does CSP match Alpine,
_hyperscript, and htmx usage? - Do tests cover both htmx and non-htmx paths?
Testing Ideas
- Submit text containing HTML tags and confirm it renders as text.
- Submit sanitized rich content with attempted event handlers and htmx attributes.
- Attempt unauthorized htmx mutations directly with forged headers.
- Verify login redirects do not get swapped into small targets.
- Run browser checks with CSP enabled and inspect violations.
Avoid
- Do not rely on htmx headers as proof of trust.
- Do not trust hidden inputs,
hx-vals, or client-side state for authorization. - Do not allow user-authored htmx attributes in normal rich content.
- Do not loosen CSP globally to fix one component without documenting the tradeoff.
- Do not expose JSON or HTML endpoints with different authorization assumptions.
© hashgraph-online, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 2 other files (assets) in plugins/LVTD-LLC/skills/skills/htmx-security of hashgraph-online/awesome-codex-plugins.
- SKILL.md
- agents/openai.yaml
- assets/icons8-code.svg
Open the folder on GitHubat commit 16b4156
Compare with similar skills
Htmx Security next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Htmx Security this skillhashgraph-online/awesome-codex-plugins | 1.2k | — | ~1.3k | Automated safety check: Pass | MIT | |
| Security Guidancealirezarezvani/claude-skills | 28k | — | ~1.9k | Automated safety check: Pass | MIT | |
| Security And Hardeningpenpot/penpot | 61k | 6 repos | ~4.7k | Automated safety check: Notes | MPL-2.0 | |
| Security Auditoreigent-ai/eigent | 15k | — | ~1.8k | Automated safety check: Notes | Apache-2.0 | |
| Security Reviewjewbetcha/opentrace | 116 | 17 repos | ~3.1k | Automated safety check: Notes | MIT | |
| Strix Code Vulnerability Scanusestrix/strix | 67k | — | ~1.1k | Automated safety check: Pass | Apache-2.0 |
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Categories
Questions about Htmx Security
What does Htmx Security do?
Review and harden security for htmx and server-driven web apps. Htmx Security is an agent skill from hashgraph-online/awesome-codex-plugins. Review and harden security for htmx and server-driven web apps.
When should I use Htmx Security?
Htmx Security fits situations like: handling user-supplied HTML; sanitizing fragments; evaluating XSS risk; configuring CSRF.
How do I install Htmx Security in Claude Code?
Run `npx skills add hashgraph-online/awesome-codex-plugins --skill htmx-security -a claude-code`. Or copy the skill folder (plugins/LVTD-LLC/skills/skills/htmx-security in hashgraph-online/awesome-codex-plugins) into .claude/skills/htmx-security in your project. Claude Code loads it when a task matches its description.
How do I install Htmx Security in Codex?
Run `npx skills add hashgraph-online/awesome-codex-plugins --skill htmx-security -a codex`. Or copy the skill folder (plugins/LVTD-LLC/skills/skills/htmx-security in hashgraph-online/awesome-codex-plugins) into .agents/skills/htmx-security in your project. Codex loads it when a task matches its description.
Can I use Htmx Security in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add hashgraph-online/awesome-codex-plugins --skill htmx-security -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/htmx-security, .gemini/skills/htmx-security, .github/skills/htmx-security and .opencode/skills/htmx-security in your project.
What does Htmx Security need to run?
SKILL.md names no scripts, command-line tools or credentials: Htmx Security is instructions for the agent only. Compatibility (from SKILL.md): Codex, Claude Code, and other Agent Skills-compatible clients..
Does Htmx Security access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Htmx Security safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Htmx Security use?
Htmx Security is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Htmx Security use?
About 1.3k tokens (SKILL.md is roughly 5.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Htmx Security?
Skills that share tags, products or a category with Htmx Security: Security Guidance (alirezarezvani/claude-skills, 28k stars), Security And Hardening (penpot/penpot, 61k stars), Security Auditor (eigent-ai/eigent, 15k stars) and Security Review (jewbetcha/opentrace, 116 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Htmx Security?
hashgraph-online (a GitHub organization) maintains it in hashgraph-online/awesome-codex-plugins, which has 1,232 GitHub stars. The repository holds 736 skills in this directory. The repository was last updated on October 6, 2026.
Source: hashgraph-online/awesome-codex-plugins on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.